<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <form style="margin: 50px auto;width: 400px;" method="get" action="http://127.0.0.1:9000/login">
    <input type="text" name="user">
    <button style="width: 100px;height: 100px;" type="submit"></button>

  </form>
</body>

</html>